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1967 Thunderbolt QD Rear Wheel Alignment HELP??? #494534
06/18/13 1:54 pm
06/18/13 1:54 pm
Joined: Jun 2013
Posts: 15
AZ
Jack Burton Offline OP
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Jack Burton  Offline OP
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Joined: Jun 2013
Posts: 15
AZ
I need some help. Everything on this bike has gone together flawlessly with exception of this alignment issue. How is this corrected. The wheel was laced by a professional?



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Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494540
06/18/13 2:07 pm
06/18/13 2:07 pm
Joined: Aug 2012
Posts: 716
West Virginia, United States
Beach Offline

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Beach  Offline

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Joined: Aug 2012
Posts: 716
West Virginia, United States
The rim should be laced centered to the hub...between the brake plate and the swingarm there should only be a thin (1/16 spacer)...and of course the drum needs to be fully seated on splines...Can't really tell from pics what the problem is..


Bill
1974 Norton Commando
1966 Lightning
1965 Lightning Rocket
1966 Norton Atlas
1967 Norton Atlas
1948 Panhead
Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494563
06/18/13 4:20 pm
06/18/13 4:20 pm
Joined: Jul 2009
Posts: 3,549
Vic. Australia
P
Pete R - R.I.P. Offline
In Remembrance
Pete R - R.I.P.  Offline
In Remembrance
P

Joined: Jul 2009
Posts: 3,549
Vic. Australia
What's the centre distance from sprocket centreline to tyre centreline?

Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494564
06/18/13 4:39 pm
06/18/13 4:39 pm
Joined: Sep 2001
Posts: 2,798
Comox BC Canada
G
Gordo in Comox Offline
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Gordo in Comox  Offline
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Joined: Sep 2001
Posts: 2,798
Comox BC Canada
If we are talking about a crinkle hub then it is not centred with the rim. If you ignore the spline part that goes into the brake drum and just measure the edge of the crinkle hub you will find that the rim should be further to the spline side.

I looked a couple of A65 wheels and the offset/difference amount is around 0.230 to 0.275 inches (rough measures) if you compare the two sides measured at the rim edge. It is a bit hard to measure with the rubber ring in place. Given that by offsetting the rim you would close the gap on one side and open it up on the other side it would be quite a change from being centred.

As well the spokes are not the same on both sides as they have different part numbers left and right.

Gordo


Without frequent roadside repairs there is no fun in riding!
Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494577
06/18/13 6:03 pm
06/18/13 6:03 pm
Joined: Aug 2012
Posts: 716
West Virginia, United States
Beach Offline

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Beach  Offline

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Joined: Aug 2012
Posts: 716
West Virginia, United States
The service manual for 1966 A65 calls for 0 offset when truing these rims...That is what mine is set at and it is perfectly centered... I didn't true the rims myself, but the person who did used the info of no offset..The manual does list an offset for the front rim..I used a set of Buchannon spokes for my rims and they didn't designate any difference between left and right spokes..


Bill
1974 Norton Commando
1966 Lightning
1965 Lightning Rocket
1966 Norton Atlas
1967 Norton Atlas
1948 Panhead
Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494578
06/18/13 6:12 pm
06/18/13 6:12 pm
Joined: Dec 2004
Posts: 9,497
Scotland
kommando Offline
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kommando  Offline
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Joined: Dec 2004
Posts: 9,497
Scotland
The factory specs for the spoke lengths have a difference of 1.5mm between the 2 sides, short spoke goes to spline side. The same spokes are used on the B44 QD hub too.

Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494592
06/18/13 8:01 pm
06/18/13 8:01 pm
Joined: Sep 2001
Posts: 2,798
Comox BC Canada
G
Gordo in Comox Offline
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Gordo in Comox  Offline
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G

Joined: Sep 2001
Posts: 2,798
Comox BC Canada
Very interesting topic. However in the examples I have had I have never seen a crinkle hub with the rim centred on the hub, they have always favoured the spline side. I can appreciate that for some it has worked out but I have never seen that happen.

When we built a 68 A50 without wheel data we needed to move the rim to the spline side to centre it in the frame.

I know the BSA Workshop manual 66-68 says to centre the rear rim on the spoke flanges but it is not clear that 'one size fits all' in that regard as they changed from the steel rear brake plate to the alloy version some where in that time frame. The steel plate offsets the wheel differently so bits cannot be mixed. Just because the total distance is taken up in the swing arm does not always mean the bits are the correct ones.

The starting point should be the sprocket alignment as that should not change if all is well with the frame then the rim location should be sorted out.

Some spoke kits are supplied with two lengths of rear spokes as mentioned above even though the difference is not very much.

Gordo


Without frequent roadside repairs there is no fun in riding!
Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494799
06/20/13 4:24 pm
06/20/13 4:24 pm
Joined: Sep 2001
Posts: 2,798
Comox BC Canada
G
Gordo in Comox Offline
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Gordo in Comox  Offline
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G

Joined: Sep 2001
Posts: 2,798
Comox BC Canada
Jack: I am curious about your wheel problem. Have you solved the offset?

Did all the wheel bits come with the machine or are some bits new?

Gordo


Without frequent roadside repairs there is no fun in riding!
Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494816
06/20/13 6:51 pm
06/20/13 6:51 pm
Joined: Dec 2002
Posts: 3,258
arkansas
L
leon bee Offline
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leon bee  Offline
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L

Joined: Dec 2002
Posts: 3,258
arkansas
I missed this the other day, but that first pic makes it look like splines could not be all the way home in the drum hub.

Re: 1967 Thunderbolt QD Rear Wheel Alignment HELP??? [Re: Jack Burton] #494993
06/22/13 7:09 am
06/22/13 7:09 am
Joined: Jun 2013
Posts: 15
AZ
Jack Burton Offline OP
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Jack Burton  Offline OP
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Joined: Jun 2013
Posts: 15
AZ
All the bits are there. I believe the fix is the spoke length like mentioned above. However, the owner said this is right and he rode it a year like this before restoration. I can't see it. I wouldn't ride it like this. The fender won't match up. We'll see.....


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